| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 24 |
7.3%
|
| -7 | Does not apply (spontaneous) | 119 |
36%
|
| 0 | 92 |
27.8%
|
|
| 2 | 1 |
0.3%
|
|
| 7 | 1 |
0.3%
|
|
| 10 | 4 |
1.2%
|
|
| 20 | 3 |
0.9%
|
|
| 30 | 4 |
1.2%
|
|
| 50 | 7 |
2.1%
|
|
| 60 | 1 |
0.3%
|
|
| 65 | 1 |
0.3%
|
|
| 70 | 2 |
0.6%
|
|
| 80 | 3 |
0.9%
|
|
| 90 | 4 |
1.2%
|
|
| 97 | 1 |
0.3%
|
|
| 100 | 64 |
19.3%
|
|
| Sysmiss | 250 |